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This research aims to determine the effect of Montessori learning media on mathematical problemsolving abilities. This research method is experimental with regression analysis techniques. The research sample consisted of 70 Bina Bangsa Vocational School students in South Tangerang City who were taken using a simple random sampling technique. The instrument for measuring mathematical problem solving uses a descriptive test of 5 questions. The results of the research show that there is a significant positive influence of Montessori learning media on mathematical problemsolving abilities with a value of tcount (3.61889) > ttable (3.13167).  

The aim of this research is to obtain significant data and analyze the influence of the Team Assisted Individualization (T.A.I) learning model on the ability to solve mathematical problems on the subject of linear programming in class X students at MA Al Ittihad Sawangan Depok. The research method used is a quasi-experimental method (quasi-experiment). Sampling was carried out using a cluster random sampling technique with a research sample of 40 students, namely 20 students in class X IPS 2 as the experimental class and 20 X IPS 1 as the control class. The analysis technique used is a comparative analysis technique with the t-test, at a significance level of α= 0,05. The analytical requirements tests used in this research are the Chi-Square test for normality test and Fisher's test for homogeneity test. At a significance level of 0,05 with the Chi-Square test in the experimental class the price X2count <X2table (-33,38 < 9,488) while for the control class the price Homogeneity test at a significance level of 0.05 with Fisher's test, obtained F-count = 1,642 and F-table = 2,165 with a significance level of α= 0,05. Because Fcount < Ftable, H0 is accepted, so it can be concluded that the two classes have the same or homogeneous variance. Hypothesis testing uses the t-test with a significance level of α= 0,05. From the calculation results, t-count = 3,619, while ttable with degrees of freedom = 38 is 2,026, meaning t-count > t-table. Thus H0 is rejected and H1 is accepted. This research concludes that mathematical problem solving abilities using the Team Assisted Individualization (T.A.I) learning model are better than mathematical problem solving abilities using the Expository model.

Learning that focuses on students' problem-solving abilities is the focus of higher education. Students who are able to develop critical thinking skills in solving problems are a necessity along with changes in workforce capability needs in the informatics era. One of the mathematics lessons at the higher education unit level is discrete mathematics. The problem that arises in discrete mathematics learning is that learning outcomes and the percentage of students completing lectures are still relatively low. The aim of this research is to improve students' solving abilities through the application of the project based learning method. This research uses classroom action research methods. The application of the project based learning method in discrete mathematics courses with graph material can improve students' abilities in solving mathematical problems, this can be seen from the research results after corrective actions were taken in learning activities in Cycles I and II. Based on the research results, it shows that through project-based learning, third semester RB class students in the Informatics Engineering Education Program at Indraprasta University PGRI Jakarta have improved their ability to solve mathematical problems in terms of individual grades and classical completion.  

Abstract. This study aims to determine whether there is an influence of the problem based learning model integrated with video animation on the mathematical problem solving abilities of class VIII students. This research was conducted at SMP Negeri 6 Percut Sei Tuan, TA 2022/2023. The research method used is a quasi-experimental design method. The sample in this study consisted of two classes namelyclass VIII-3 as the experimental class and class VIII-4 as the control class. The experimental class uses a problem-based learning model integrated with video animation and a control class with conventional learning. Obtaining the average score of the final test (posttest) of the experimental class students is equal to 89.22, whereas in the control class the average result of the student's final test score was 72.55, in the hypothesis test, the results obtained from the average difference test (t-test) with statistical values t_hitung>t_tabel(10.56 > 1,671 ) which means there is an influence from the usea problem-based learning model integrated with video animation that is applied to the experimental class. This indicates that the mathematical problem solving abilities of the experimental class students are better than the control class.

A This study aims to determine: (1) the effect of Blended Learning models towards Mathematical Student’s Problem Solving Abilities and Self-Regulated, (2) the improvement of student’s mathematical problem solving and self regulated learning (3) the advantages of the advantages and disadvantages of blended learning model. This type of research includes descriptive qualitative research using library research methods. The data in this study were obtained from a collection of literature such as theses and journals that are relevant to the topic of discussion, namely Mathematical Student’s Problem Solving Abilities And Self-Regulated. The results show that, 1) Blended Learning Model has a great effect on students' problem solving abilities based on the overall effect size calculation which produces an average effect size of 1.56 where this number is included in the high category and Blended Learning Model has a great effect on student’s self-regulated based on the overall effect size calculation which produces an average effect size of 1.73  2) There is an increase in  mathematical the student's problem solving abilities and self-regulated learning that are taught through blended learning models. This can be seen from the achievement of N-Gain value and indicators in the experimental class in the literature which is generally better than the control class. 3) Based on the analysis, it was found that the advantages and disadvantages of blended learning. it can be obtained that the advantages of blended learning models as follows: (a) Learning is more effective and efficient, (b) Improve accessibility. with blended learning, it is easier for learning participants to access material learning. and disadvantages of blended learning is Not evenly distributed facilities owned by students, such as computers and internet access. Even though blended learning requires adequate internet access, if the network is inadequate it will make it difficult for participants to take part in independent learning via online.

This study aims to describe students' mathematical problem solving skills in solving word problems.  The population in this study were all fourth grade students at SD 4 Dersalam with a total sample of 24 students.  The research method used is a qualitative approach with descriptive methods.  The research instrument used was in the form of test questions (essays) and interview for mathematical problem-solving abilities in diagrammatic material.  The data collection technique in this study has three stages of procedure namely;  1) preparation stage, 2) implementation stage, 3) final stage.  Based on the results of the tests that have been given, the ability to solve mathematical problems in the good category is 14 students (58.3%), the medium category is 4 students (16.6%) and the low category is 6 students (25%).  Based on the categories of mathematical problem solving abilities, namely good, sufficient and insufficient, it can be described as follows: 1. Students' Mathematical Problem Solving Ability in the Good Category 2. Students' Mathematical Problem Solving Ability in the Enough Category 3. Students' Mathematical Problem Solving Ability in the Poor Category.

This research was conducted with the aim of producing digital learning media using the Smart Apps Creator through a Realistic Mathematics Education approach that is valid, effective, and able to improve students' mathematical problem solving abilities in the matter of a system of two-variable linear equations. This type of research is Research and Development (R&D) with the ADDIE model. From the research results, it was obtained that the media and material validity values were 93.6% and 93% with very valid categories. The practicality of the media through the results of the teacher's response questionnaire obtained a practicality value of 97.3% in the very practical category and the results of the student response questionnaire for the small group test and large group test obtained values of 90.9% and 91.4% in the very practical category. Then the value of effectiveness is seen through the mastery of classical learning and the results of the student response questionnaire obtained percentages of 87.5% and 94.05% with very effective categories. Improving problem solving abilities in students, the results obtained are that the level of students' problem solving abilities is at a percentage of 92% with a very high category, while based on the N-Gain test the average value obtained by students is 0.6473 which means there is an increase in problem solving abilities in students medium category. So based on the results obtained it can be concluded that the learning media developed in this study are valid, practical, effective, and able to improve students' mathematical problem solving abilities.

This study aims to describe the improvement of mathematical problem-solving skills after applying the realistik mathematics learning assisted by digital media of class VIII students of SMP Dharma Patra Sei Lepan for the 2022/2023 academic year. The subjects in this study were 32 class VIII-A students of Dharma Patra Private Middle School. Data collection techniques used were teacher observation sheets, tests of mathematical problem-solving skills, and documentation. This research is a classroom action research (PTK) which consists of 2 cycles, each cycle consisting of 2 meetings. Before taking action, first given the initial test and at the end of each cycle is given a test of students' mathematical problem-solving abilities. The test results of students' mathematical problem-solving abilities increased from the initial test, cycle I, and cycle II. In the classical pre-test, 3 students (9.38%) passed and the average pre-test ability was 49.12% with a very low level of ability. In the first cycle test, there was an increase classically, 17 students (53.13%) completed and the average ability test obtained 69.01% with the ability level in the medium category. Then the second cycle test also experienced an increase in classically obtained 28 students (87.5%) completed and an average ability obtained 81.05% with a high level of ability category. Thus it can be concluded that the application of realistik mathematics learning assisted by digital media can improve the mathematical problem-solving skills of class VIII students of SMP Dharma Patra Sei Lepan.

This study aims to determine the application of problem based learning learning models with lottery game media in improving junior high school students' problem solving abilities. This research is an experimental research in the form of Pre-Experimental Designs. The design used is One Group Pretest-Postest Design. The population in this study were class VIII A and class VIII B. The sample in this study was students of class VIII B consisting of 20 students with the selection of subjects based on the cluster random sampling technique. The data collection technique used is a measurement technique with a data collection tool in the form of test questions in essay form. The data analysis technique used was anava one line of dissimilar cells, with further testing using the Scheffe method. The research results obtained were that there was a significant increase in students' mathematical problem solving abilities before and after being given treatment through the problem based learning model using lottery media with high categories.